function Xian80_To_WGS84(x ,y,type){
    var point=null;
    proj4.defs("EPSG:4490","+proj=longlat +ellps=GRS80 +no_defs");
    if(type==0){
        //proj4.defs("EPSG:4546","+proj=tmerc +lat_0=0 +lon_0=111 +k=1 +x_0=500000 +y_0=0 +ellps=GRS80 +units=m +no_defs");
        proj4.defs("EPSG:2361","+proj=tmerc +lat_0=0 +lon_0=111 +k=1 +x_0=37500000 +y_0=0 +a=6378140 +b=6356755.288157528 +units=m +no_defs");
        point = proj4.transform(proj4.Proj("EPSG:2361"), proj4.Proj("EPSG:4490"), proj4.toPoint([y,x]));
    }
    // console.log(point.x+","+point.y);
    return {x:point.x.toPrecision(8),y:point.y.toPrecision(8)};
};

